Eviction

Removing a memory from default retrieval when it stops earning its slot — by demoting its tier, never by deleting it.

Why it matters in a memory layer

The distinction is the same one supersession makes and for the same reason: a faded memory is not false, nobody contradicted it, and the store holds the only copy. Demotion keeps it reachable by an explicit historical query and recoverable if it matters again; deletion throws away something still true on the strength of a heuristic. The cap belongs on the retrievable tier rather than on the store, because that is what actually costs — long-term memories are what every query scans and what competes for the token budget.

Connections

Taught in: Forgetting Under a Budget

Used in: What Must Never Be Dropped · Scope, Then Rank